Shelter



FIG. 1 is a top, front and right side perspective view of a sheltershowing my new design;

FIG. 2 is a right side elevational view thereof, the left sideelevational view thereof being identical to that shown;

FIG. 3 is a front elevational view thereof, the rear elevational viewthereof being identical to that shown;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The ornamental design for a shelter, as shown and described.